Machine for forming sewer-pipe of concrete.



J. H. STEWART & J. 'M. SCHENKN MACHINE FOR FORMING SEWER PIPE 0F CONCRETE. APPLICATION FILED Hi8 7,1914.

1,177,732. Patented Apr. 4, 1916.

3 SHEETSSHEET lr J. H. STEWART & 1. M. SCHENK. 'MACHINE FOR FORMING SEWER PIPE 0F CONCRETE;

APPLICATION FILED FEB. 7. 1914.

1,177,732. I Patented Apr. 4, 1-916.

3SHEETS-SHEET 2- J. H. STEWART & J. M. SCHENK.

MACHINE FOR FORMING SEWER PIPE 0F CONCRETE. APPLICATION FILED FEB. 7. 1914.

Patented Apr. 4,1916.

3 SHE'ETS-SHEET3- I l l I l i l 5 1 i a -z UNITED STATES PATENT OFFICE.

JOHN H. STEWART AN D JOHN MLSCHENK, OF WATEBLOO, IOWA, ASSIGNORS TO CEMENT TILE MACHINERY COMPANY, OF WATERLOO, IOWA.

MACHINE FOR FORMING- SEWER-PIPE OF CONCRETE.

Specification of Letters Patent.

Application filed February 7, 1914. Serial No. 817,208.

To all whom 2'25 may concern Be it known that we, JOHN H. STEWART and J onx M. Snexx, citizensof the United States of America, and-residents of \Vaterloo, Blackhawk county, Iowa, have invented certain new and ..useful Improvements in Machines for Forming Sewer-Pipe of Concrete, of which the following is a specification. A

Our invention relates to improvements in sewer-pipe machines, and theobject o'f'our improvement in such machines is to furnish 'means for forming the hollow sewer-pipe from concrete orsimilar materials adapted to also formv a bell or' expansion at one end of each pipe. This object we have accomplished by the mechanism which is hereinafter described and claimed, and which is illustrated in the accompanying drawings, in which: x

Figure 1 is a side elevation of our improved pipemaehine. Fig. 2 is a frontele- Fig. 3 is, an ensaid machine, shown in Fig. 4, taken on the line a-b of the latter. Fig. 1 is a vertical axial section of a hollow mold-casing, a-pipe being formed therein, and'the former-head" of the machine operatively located within said parts, and in a position suitable to form the expanded or bell-shaped end of the said pipe.

Similar numerals of reference denote corresponding parts throughout the several views.

Hitherto, in the making of hollow sewerpipes from concrete or. the like materials byforming mechanism. 1t has been found difficult, if not impossible, to properly form on one end of such pipe, a hell or' hollow expansion of the kind necessary for use in fitting such pipes together for use as sewer-pipe, especially. The mechanism shown, described and claimed herein, isv intended to furnish the necessary means for the end. described.

Referring first to Fig. 1, a hollow, cylin-' drical mold-casing 11 is shown in longitudinal axial section, and has one end'expanded in diameter at 12, with an annular cap 9 fitted over said lower expanded end 12. A

cylindrical former-head 1 is shown fitting the concentriccentral opening of said cover 9,-Ithe diameter of said former-head being" that of the interior hollow of a pipe, to be formed within said mold-casing. Said former-head 1 is secured coaxially and upon the lower end of a vertical rotatable shaft 14. The numeral 2 denotes an abutment fixed on the top of the former-head being centrally oi'ificed to permit the passage of the shaft 14 therethrough. The ends of this body are curved, and extend only as far outwardly as the circumferential periphery of.

said former-head. Crescent shaped. rubblng-blocks 10 are mountedon the convex faces of the bodies 2 for adjustment out- .wardly to take up for wear thereon, and

are adapted to trowel the cement upon the inner wall of the mold casing 11. The numeral 3 denotes lugs projecting" oppositely from opposite sides of said packerbody 2-10, and orificed horizontally and transversely to receive the pintles 4, on

which are pivotally mounted the forked parts of the swinging former-bodies. 5;

denotes a block mounted movably between the forks of thepart 5 near itsloop 7, and having pintlesextending movably' into orificed seats in said forks. The numeral 8 denotes a rod, whose lower end is secured to the block 6, while its upper end is secured to alug on one side of a collar 17 slidably mounted upon said rotatable shaft 14. The numeral denotes a pair of bars spaced apart and located'on opposite sides of the shaft 14, whose spacing bolts serve as seats for said rods 8. A hand lever 20 is medially pivoted to a fixed bracket or support 21,

-fixedly mounted onthe cross-bar 24, the

145 and the two rear uprights 50, which are connected by means of different horizontal Patented Apr. 4, 1916.

\Ve have provided means for beams 32 and 33.

beamspsuch as 49 and 51 onthe sides, and 33, '32, 30 and 24 in front. Said uprights are rfixedly supportedupon base beams 75, and

arotary horizontal carriage 74 is mounted in front of the two front uprights 45, and

adapted to receive the base supporting ring 9 of the mold-casing 11.

A shaft 14 is rotatably and slidably mounted in alined bearings on the cross- The belt-wheel 34 is s'plined upon the other end of the shaft 14 between the cross-beams 32 and 33 to rotate [same by permitting the shaft to slide through its hub vertically. Said beltwheel 34 is driven to rotate said shaft by means of the belt 35,, which is carried over the idlerissecured to the collar 27 fixed on said shaft 14. It.is then carried about an idlenpulley 62, mounted in said frame and carried thence downwardly and passed about and secured to a winding-drum 43, whose shaft 42 is 1'0- tatably mounted in bearings 52 on the side cross-beams 51. Mounted on the same shaft is a worm-wheel 41, which is in mesh with a worm .40 on the horizontal shaft 37, the

latter rotatably mounted in bearings 36 on the cross-beam 30, and the similar crossbeam connecting the rear uprights 50 of the machine. Mounted loosely, but non-slidably', upon said shaft 37 are the belt-wheels 38 and70, provided with oppositely-directed like friction-rims and 69, containing'an nular friction-heads 66. The numeral 67 denotes a cylindrical body mounted slidably upon said shaft 37, and having oppositely.

coned ends-which'ane adapted to enter alternately and fit the inner faces of said friction-head 66, to alternately push said heads into frictional driving engagement with the friction-rims 65 and 69, respectively. Said body: 67 is moved along the shaft '37 by means of an-arm 68 pivoted medially thereto, the arm' 68 forming one member of the bell-crank lever 53, which is fulcrumed upon a short shaft seated in.- a bearing 71 onthe under side of one of the side cross-beams 51.

v The other arm or member of said bell-crank lever 53 is extended forwardly, and pivotally connected to a vertical rod 29, the latter being movably seated in bearing orifices in the brackets 72 and 73, supported on a front upright 45. Near the upper and lower ends of said rod 29 are fixed'thereon the collars 31 and 28, respectively. Said collars limit the up and down movement of said rod by re- Y24, and which is slidably mounted on one of the rods 81, has a rearwardly projecting lug 76, which. when the shaft 14 is moved up by reason of the winding up of the cable '54 comes into contact with the upper collar 31, and lifts it and saidrod 29 upwardly until said collar engages the bracket 72. In lifting the rod 29 upwardl \-',the bell-crank lever 53 is lifted, causing its arm 68 to shift the cylindrical body 67 out of engagement with the friction clutch 66, and into engagement with the other friction clutch 69.- Upon the shaft 59 are fixedly mounted the two pulleys44 and 60. driving respectively the belts 39 and 61, which in turn. drive the pulleys 38 and'7O on the shaft 37. Since both of the pulleys 38 and are loose upon the shaft 37, except when temporarily connected thereto by means of one or the other of said frictionclutches, the result of the preceding action isto reverse the direction of rotation of the shaft 37, its worm 40, the worm-wheel 41 and.thewinding-drum 43, which causes an unwinding of the cable 54, permitting said causes the arm 68 to move the body 67 out of engagement of the clutch 69 and into engagement with the clutch 65. In this way. the shaft 37 has its rotation again reversed to wind up the cable 54 and again lift the shaft 14. The numeral '56denotes, a hand-lever pivoted at its lower end to one. of the uprights 45, and has a connecting-rod 57 pivotally connected thereto, the other'end of saidrod 57 being, slidable in a bearing 64 onone of the rear uprights 50. Other connecting rods ,58'are pivotally connected between the rod 57 and the horizontal arm of the bell-crank lever \Vhen it is desired to reverse the direction of rotation of the shaft 37 at any stage of its movement, said hand-lever 56 may beshifted appropriately to move said parts to act upon the body 67 to engage.

either of the frictionclutches.

The hinged forming-bodies 7 on the former-head 1 are raised and lowered as follows: The sleeve 17 which is fixedly connected to the other sleeve 16 is slidable upon said shaft 14. The spaced vertical rods 81 are supported in bearings 23 on the crossbar 25, also in bearings on the cross-bars 32 and 33. The numeral 26 denotes an annular table with a raised rim, seated concentrically about the shaft 14, and having on opposite sides, bearings which are ,slidably seated upon said rods 81. Rods 77 have their lower ends secured to the bearings on said table 26 and extend upwardly to have their upper ends slidably seated in orificed lugs 80 onthe 1, cross-bar 132.

v The numerals 79 and'78 denote spaced collars secured on' said rods 77 t on opposite, sides'of the lugs 80. The bearr with the lowermost collars 7 8 when they ings 22are adapted to come into contact have moved upwardly toward the uppermostlimit of their vertical movement, carrying said collars upwardly with them, thus lifting the table 26. When said table 26 is j. thus lifted, a hollow cylindrical mold-casing 1-1, such'as is shown in Fig. 4, may be seated upon the carriage 74 concentric with and under the .raisedformer-head 1. As the verticalimovement} of. the shaft 14 is reversed, and said shaft descends, the bearings 22 follow, and the table 26 descends until it rests upon the top of. the collar-casing 11,

concentrically, with its central opening coincidentwith the opening of the upper end of the mold-casing. The shaft 14 continues to descend, clearing the former-head 1 down to the bottom of said mold-casing, as indicated inJsaid Fig. 4, without affecting, the table 26,

The

and the former-bodies 7 being lowered'by depressing the hand-lever 20, the said bodies "7,"in,ro,tating,]while the former-body 1 is rotating but not. lifting, move within the bell 12'of' said casing and, the hollow of the pallet 9 to trowel the bell-shaped end of the tile 13 therein. When said bell-shaped end isEformed by the packing action of the i bodies 7, the .material crowded under the bodi'es 7'-by the other packer-bodies'2-1O flifts them gradually to swing them to their raised positions, andthen the lever 20 is sprung 'to one side enough to engage the hanger-bracket .82, which holds it until released to permit it to descend. The formerhead 1, which is still in rotation, is then started on its upper'movement by using the starting-lever 56; The cylindrical part 1' then trO-wels the cylindrical-part of the tile 1 in, its upwardmovement through the casing 11. As the former-head arrives in its upper position clearing the top of said casing 11, the table 26 is lifted by means of the above described mechanism, releasing the casing 11, which may then be swung out of line with said former-head by rotation of the carriage 74. The mold-casing with the formed tile 13 may then be removed, and

the casingtaken ofi".

The fo'rmer-body7 is somewhat inclined so as to cooperate with the curved packerbodies 2 in acting upon the concrete to engage the samev and both trowel and pack it into place againstvthe inner wall of the mold-casing.

It is obvious that the former-head 7 may be difi'erently shaped and variously supported and actuated, as desired, to form the bell-shaped end of the tile 13 in cooperation with the former-head 1, without departing from the scope and principles of our invention. Also other equivalent mechanisms may be used as found convenient to raise and lower said head, and simultaneously rotate the same. We do not wish to be understood to be confined specifically to the mechanism shown for that purpose.

Having described our invention, what we claim as new, and desire to secure by Let ters Patent,-1s:

In combination, in a machlne for forming bell-end sewer pipe sections, a mold-casing having a bell-end, an annular pallet for partially closing said bell-end, a rotatable cylindrical former-head movable axially longitudinally through the mold-casing, an arm pivoted to the top of said formerhead and having its outer end bent down-' ward obliquely, a rod having its lower end pivoted to said arm intermediate the ends of i the latter, means for raising and lowering said rod to swing the downwardly bent end of the arm beyondthe former-head into the bell-end of the mold-casing over said pallet,

and means for simultaneously rotating said former-head and moving it longitudinally through the mold-casing;

Signed at Waterloo,

of Jan. 1914.

JOHN H. STEWART. JOHN M."SOHENK.' Witnesses: W. H. BRUNN,

G. G. KENNEDY.

Iowa, this 21st day 

